The Rev. Jeremy Rose of Axis, who is in his 30s, said most new songs focus on how worshippers feel about God but don’t contain much theology. Older hymns often have good theology but lack a personal touch. But “In Christ Alone” has both. “This hymn takes theology and attaches it to my day-in and …

Researchers have found that certain features of music are consistently associated with producing strong emotions in listeners. Combined with heartfelt lyrics and a powerhouse voice, these structures can send reward signals to our brains that rival any other pleasure.